Feature: add truncation detection to the Tooltip component

[b1ink0]

Description

This pull request introduces a new feature to the Tooltip component, allowing tooltips to be shown only when the associated text is visually truncated.

Relevant Technical Choices

• Added a new showWhen prop ("always" or "truncated") and an optional truncationRef prop to TooltipProps, allowing tooltips to appear only when the referenced element's text is truncated.

Testing Instructions

Screenshot/Screencast

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Checklist

• If this PR adds a new component, it has a linked issue that was discussed and approved before I started work.
• I have thoroughly tested this code to the best of my abilities.
• I have reviewed the code myself before requesting a review.
• This code is covered by unit tests to verify that it works as intended.
• The QA of this PR is done by a member of the QA team (to be checked by QA).

Partially fixes rtCamp/next-pms#2052

[Copilot]

Pull request overview

Adds optional truncation-aware display behavior to Tooltip, supporting the linked next-pms enhancement.

Changes:

• Adds showWhen and truncationRef props.
• Detects horizontal text truncation before opening.
• Adds Storybook controls and interaction coverage.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
utils.ts	Adds truncation detection utility.
types.ts	Defines the new public props and mode type.
tooltip.tsx	Conditionally cancels tooltip opening.
tooltip.stories.tsx	Documents the new props in Storybook.
tooltip.interactions.stories.tsx	Tests truncated and non-truncated cases.

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